import React, { Component } from "react";

export class Comment extends Component {

  // 准备状态
  state = {
    // 当前用户
    user: {
      name: '清风徐来',
      vip: true,
      avatar: 'https://static.youku.com/lvip/img/avatar/310/6.png'
    },
    // 评论列表
    comments: [
      { 
        id: 100, 
        name: '__RichMan', 
        avatar: 'https://r1.ykimg.com/051000005BB36AF28B6EE4050F0E3BA6',
        content: '这阵容我喜欢😍靳东&闫妮，就这俩名字，我就知道是良心剧集...锁了🔒',
        time: '2021/10/12 10:10:23',
        vip: true,
        collect: false  
      },
      { 
        id: 101, 
        name: '糖蜜甜筒颖', 
        avatar: 'https://image.9xsecndns.cn/image/uicon/712b2bbec5b58d6066aff202c9402abc3370674052733b.jpg',
        content: '突围神仙阵容 人民的名义第三部来了 靳东陈晓闫妮秦岚等众多优秀演员实力派 守护人民的财产 再现国家企业发展历程',
        time: '2021/09/23 15:12:44',
        vip: false,
        collect: true
      },
        { 
        id: 102, 
        name: '清风徐来', 
        avatar: 'https://static.youku.com/lvip/img/avatar/310/6.png',
        content: '第一集看的有点费力，投入不了，闫妮不太适合啊，职场的人哪有那么多表情，一点职场的感觉都没有',
        time: '2021/07/01 00:30:51',
        vip: true,
        collect: false
      }
    ],
    // 输入内容
    content: ''
  }

  setContent = e => {
    // 修改状态前判断字符串长度是否是100以内
    if (e.target.value.length <= 100) {
      this.setState({
        content: e.target.value.trim()
      })
    }
  }

  // 添加评论
  addComment = () => {
    // 准备好评论对象
    const newComment = {
      id: Math.random(),
      // 使用当前用户信息
      ...this.state.user,
      content: this.state.content,
      time: new Date().toLocaleString(),
      collect: false
    }
    // 追加一个评论对象给comments
    this.setState({
      comments: [ newComment, ...this.state.comments ],
      content: ''
    })
    // 清空当前输入的内容
  }

  // 删除评论
  delComment = (id) => {
    // 删除id对应的评论
    this.setState({
      comments: this.state.comments.filter(item => item.id!==id )
    })
  }

  // 收藏评论
  collectComment = (id) => {
    // 收藏评论 取消收藏 其实都是在修改 comments
    this.setState({
      comments: this.state.comments.map(item=>{
        if (item.id === id) {
          // 修改
          return {
            ...item,
            collect: !item.collect
          }
        } else {
          return item
        }
      })
    })
  }

  render() {
    return (
      <div className="comments">
        <h3 className="comm-head">评论</h3>
        <div className="comm-input">
          <textarea value={this.state.content} onChange={this.setContent} placeholder="爱发评论的人，运气都很棒"></textarea>
          <div className="foot">
            <div className="word">{this.state.content.length}/100</div>
            <div className="btn" onClick={this.addComment}>发表评论</div>
          </div>
        </div>
        <h3 className="comm-head">
          热门评论<sub>({this.state.comments.length})</sub>
        </h3>
        <ul className="comm-list">
          {this.state.comments.map(item => {
            return (
              <li className="comm-item" key={item.id}>
                <div className="avatar" style={{ backgroundImage: `url(${item.avatar})` }}></div>
                <div className="info">
                  <p className={`name ${item.vip?'vip':''}`}>
                    {item.name}
                    {item.vip?<img
                      alt=""
                      src="https://gw.alicdn.com/tfs/TB1c5JFbGSs3KVjSZPiXXcsiVXa-48-48.png"
                    />:null}
                  </p>
                  <p className="time">
                    {item.time}
                    {/* 收藏 */}
                    <span onClick={()=>this.collectComment(item.id)} className={`iconfont icon-collect${item.collect?'-sel':''}`}></span>
                    {/* 删除 */}
                    {item.name===this.state.user.name
                      ?<span onClick={()=>this.delComment(item.id)} className="del">删除</span>
                      : null}
                  </p>
                  <p>{item.content}</p>
                </div>
              </li>
            )
          })}
        </ul>
      </div>
    );
  }
}

export default Comment;
